its good. no misunderstanding. but fill with uncertainty, sadness, mutual pining. (fyi this is the first time i know of this word lol)
i do am glad the author decide to modify the original plan of this story. where author planning an open ending where they broke up, meet again in university and ending it that way. let me just say this with confidence, if this were the ending and storyline, you will not see me here.
anyway, i like the story. the fact that they're not even a thing but still so much inlove with each other is giving it much more impactful of their relationship when they accidentally meet again in university. also the fact that this whole 'coincidence' happening all around them just to make them meet each other again, its like the fate really pushing them to meet each other and saying 'i'll let you be happy now after you endure all that struggle'.
edit- okay i was reading the comment section, and seeing that so many people is very unhappy with the side story. ngl, me too. but not as much. honestly tho, what do you expect from Jinhyuk? he always has been like that. he WILL hide their relationship as long as possible. He will not tell anyone. Remember, when Heechan is accused in high school? he did not try to defend him bc, he did voice his opinion but thats that. Its a half asses effort. When that part happen, I'm not very happy with how they handling things, Jinhyuk especially. sure you're a kid, can't do shit, right? because your study is more important (dont get me wrong, it is important) but when your close one is treated this way, I will defend them and tellimg that trash scum teacher the truth. want to report to his mother? for what? for being friend with Heechan? his study is still good so what does it matter? i guess there's this type of ppl, and Im not one.
Now then, remember i mention the original plan of the story where the author want an open ending? seems like the side story is to quench author thirst for open ending. and that resulting in ppl feel unhappy and prefer to skipping them. also, i wouldn't really call it bittersweet ending. make sure you know how to use that term first before saying it.
Minority